[Spring] 어노테이션을 통한 스프링 설정 (Annotation Config)

.xml 파일에 생성한 빈(Bean) 객체들을 @Configration 어노테이션을 사용해서 자바로 작성 가능하다.

 

 

1. 기본

@Configuration
public class MemberConfig {

    // <bean id="studentDao" class="ems.member.dao.StudentDao" />
    @Bean
    public StudentDao studentDao() {
        return new StudentDao();
    }
    
}

 

 

2. <constructor-arg> 태그 사용

/*
 * <bean id="registerService" class="ems.member.service.StudentRegisterService">
 * 	<constructor-arg ref="studentDao" ></constructor-arg> 
 * </bean>
 */

@Bean
public StudentRegisterService registerService() {
	return new StudentRegisterService(studentDao());
}

 

 

3. setter를 이용한 의존 객체 주입

/*
 * <bean id="dataBaseConnectionInfoDev" class="ems.member.DataBaseConnectionInfo"> 
 * 	<property name="jdbcUrl" value="jdbc:oracle:thin:@localhost:1521:xe" /> 
 * 	<property name="userId" value="scott" /> 
 * 	<property name="userPw" value="tiger" /> 
 * </bean>
 */
 
@Bean
public DataBaseConnectionInfo dataBaseConnectionInfoDev() {
	DataBaseConnectionInfo infoDev = new DataBaseConnectionInfo();
	infoDev.setJdbcUrl("jdbc:oracle:thin:@localhost:1521:xe");
	infoDev.setUserId("scott");
	infoDev.setUserPw("tiger");

	return infoDev;
}

 

 

4. List 타입 객체

/* <property name="developers">
 * <list>
 *  	<value>Cheney.</value>
 *	<value>Eloy.</value>
 * 	<value>Jasper.</value>
 *	<value>Dillon.</value>
 * 	<value>Kian.</value>
 * </list>
 * </property>
 */
 
ArrayList<String> developers = new ArrayList<String>();
developers.add("Cheney.");
developers.add("Eloy.");
developers.add("Jasper.");
developers.add("Dillon.");
developers.add("Kian.");
info.setDevelopers(developers);

 

 

5. Map 타입 객체

/* <property name="administrators">
 * <map>
 * <entry>
 *	<key>
 *	<value>Cheney</value>
 *	</key>
 *	<value>cheney@springPjt.org</value>
 * </entry>
 * <entry>
 *	<key>
 *	<value>Jasper</value>
 * 	</key>
 *	<value>jasper@springPjt.org</value>
 * </entry>
 * </map>
 * </property>
 */

Map<String, String> administrators = new HashMap<String, String>();
administrators.put("Cheney", "cheney@springPjt.org");
administrators.put("Jasper", "jasper@springPjt.org");
info.setAdministrators(administrators);

 

 

- 메인 클래스에서 접근

// GenericXmlApplicationContext ctx = 
// 		new GenericXmlApplicationContext("classpath:applicationContext.xml");

// 어노테이션을 이용한 스프링 설정
AnnotationConfigApplicationContext ctx = 
		new AnnotationConfigApplicationContext(MemberConfig.class);

 

 

- 기능 별로 구분한 MemberConfig 파일 @Import

@Configuration
@Import({ MemberConfig2.class, MemberConfig3.class })
public class MemberConfig1 {
	.
	.
	.
}

//@Import를 통해 하나로 통합한 MemberConfig1만 사용
AnnotationConfigApplicationContext ctx = 
		new AnnotationConfigApplicationContext(MemberConfig1.class);